Boiler house Level controls
2
Wiring diagram (LCR2652)
For continuous controller (4 - 20 mA) or Pump ON/OFF controller
ALARM
14
MIN
PUMP
MAX
1
1
2.3 44
2
3
4
1
1
M 0.5 A (semi-delay)
12
13
13
5
LP20/LP21/PA420
2 1
8
9
10
6
7
11
Fig. 5
Item 1
Fixing screws for terminal strip
2 3 4
MIN output contact, de-energizing delay: 3 sec.
Pump output contact
MAX output contact, de-energizing delay: 3 sec.
5 Connection of supply voltage 24 Vdc with fuse 0.5 A (semi-delay) provided on site 6 Actual value output 4-20 mA 7 Output 4-20 mA manipulated variable Y 8 Feedwater flowrate input, 4-20 mA 9 Steam flowrate input, 4-20 mA 10 Data line for operating and display unit BHD50 11 Level transmitter LP20/LP21/PA420, 4-20 mA. 12 Central earthing point (CEP) in control cabinet 13 Earthing point at the auxiliary equipment (e.g. PA420/LP20/LP21) 14 Input for level limit switch (24Vdc), ON = alarm, OFF = normal water level
TI-P693-24 EMM Issue 1
Page 4 of 6
LCR2652 BHD50 Level Controller Operating and Display Unit
Powered by FlippingBook